17. h2h4 A thematic move that pops up in many lines, as the careful reader has already noticed. The idea is to give luft to the king and also prepare the rook lift with Rh3. White again should exercise patience before going after the e4-pawn. Black is ready to play with e6-e5 with good play. 17... c6e7 This is Black's only meaningful plan. 18. c2e4  18... e7f5  19. e3g5 